多语言编程在高炉喷煤PLC控制系统中的应用

Application of SFC in PLC Control System of Pulverized Coal Injection

为了解决用梯形图语言编写顺序控制设备时所存在的编程复杂、理解困难等问题,引入PLC的顺序功能图来编程是一种非常有效的方法,该方法具有编程简单而且直观等特点。本文以某高炉喷煤系统单罐循环的控制为例,采用顺序功能图与梯形图、功能块图相结合的方法编写控制程序,与以往常用的梯形图、功能块图编程方法相比具有简单、直观、逻辑性强等特点,大大提高了编程的效率。

For resolving the complexity and indigestibility in programming for sequential control by use of the ladder diagram,it is an effective method to program the sequential control by making use of the Sequential Functional Chart（SFC） of PLC.This method is of simple and direct characteristics.This paper utilizes the method of SFC combining with Ladder diagram and Function block diagram to program the Pulverized Coal Injection control system of Blast Furnace.Comparing with the method of Ladder diagram and Function block diagram,we can see that this method is more simple,direct and logical,and it improves the programming ef？ciency.